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from Wikipedia, the free encyclopedia

Circulatory system

A circulatory system (sometimes cardiovascular system) is an organ system that moves substances to and from cells; it can also help stabilize body temperature and pH (part of homeostasis).

There are three types of circulatory systems (from simplest to most complex): no circulatory system, open circulatory system, and closed circulatory system.

Note: This article excerpts material from the Wikipedia article "Circulatory system", which is released under the GNU Free Documentation License.

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